Led's are getting bigger and brighter. They run hotter. Today's Quad P60 dropins already can't be run on high for more than a few minutes before the heat builds up. In 5-15 years, LED's will be running even hotter and our old C2 bodies that aren't up to the task now won't be up to the task then.
Grab a couple for yourself or your collection, but don't think that in 15 years we'll still be trying to cram drop-ins into the old SF bodies.
I would like to think that the next generation of LED's will be designed to run both brighter and cooler than todays LED's.